/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.common;

import static org.junit.jupiter.api.Assertions.assertEquals;

import org.junit.jupiter.api.Test;

class PagerTest {
  @Test
  void testGetPageCount() {
    assertEquals(5, new Pager(1, 214, 50).getPageCount());
    assertEquals(1, new Pager(2, 35, 50).getPageCount());
    assertEquals(4, new Pager(3, 35, 10).getPageCount());
  }

  @Test
  void testGetOffset() {
    assertEquals(125, new Pager(6, 500, 25).getOffset());
    assertEquals(45, new Pager(10, 500, 5).getOffset());
  }

  @Test
  void testGetPage() {
    assertEquals(3, new Pager(3, 240, 50).getPage());
  }

  @Test
  void testGetPageWhenGreaterThanTotalPages() {
    assertEquals(5, new Pager(8, 240, 50).getPage());
  }

  @Test
  void testGetPageWhenLessThanOne() {
    assertEquals(1, new Pager(-1, 240, 50).getPage());
  }

  @Test
  void testGetPageSize() {
    assertEquals(30, new Pager(3, 240, 30).getPageSize());
  }

  @Test
  void testGetPageSizeWhenLessThan1() {
    assertEquals(1, new Pager(3, 240, 0).getPageSize());
  }

  @Test
  void testGetTotal() {
    assertEquals(200, new Pager(2, 200, 50).getTotal());
  }

  @Test
  void testTotalZero() {
    assertEquals(0, new Pager(1, 0, 50).getTotal());
  }

  @Test
  void testTotalWhenLessThanZeroA() {
    assertEquals(0, new Pager(4, -5).getTotal());
  }

  @Test
  void testTotalWhenLessThanZeroB() {
    assertEquals(0, new Pager(4, -5, 50).getTotal());
  }

  @Test
  void testGetOffsetWithTotalZero() {
    assertEquals(0, new Pager(2, 0, 50).getOffset());
  }
}
